Sony ICF-S79 Service Manual
Fm/am synthesized radio
fm/mw/lw synthesized radio
tv/weather/fm/am synthesized radio
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Also See for ICF-S79:
- Operating instructions manual (11 pages) ,
- Operating instructions (2 pages) ,
- Operating instructions (2 pages)
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ICF-S79/S79L/S79V
SERVICE MANUAL
MICROFILM
Photo: ICF-S79V
SPECIFICATIONS
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
FM/AM SYNTHESIZED RADIO
FM/MW/LW SYNTHESIZED RADIO
TV/WEATHER/FM/AM SYNTHESIZED RADIO
US Model
ICF-S79V
AEP Model
ICF-S79/S79L
UK Model
ICF-S79L
ICF-S79
ICF-S79L
ICF-S79V
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Table of Contents
Related Manuals for Sony ICF-S79
Summary of Contents for Sony ICF-S79
- Page 1 ICF-S79/S79L/S79V SERVICE MANUAL US Model ICF-S79V AEP Model ICF-S79/S79L UK Model ICF-S79L Photo: ICF-S79V SPECIFICATIONS Notes on chip component replacement • Never reuse a disconnected chip component. • Notice that the minus side of a tantalum capacitor may be dam- aged by heat.
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Page 2: Section 1 General
SECTION 1 This section is extracted from instruction manual. GENERAL – 2 –... - Page 3 – 3 –...
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Page 4: Section 2 Disassembly
SECTION 2 DISASSEMBLY Note: Follow the disassembly procedure in the numerical order given. REAR CABINET 5 BATT lead (red) 3 two claws 5 antenna lead 4 rear cabinet 2 six screws (BTP 3 × 25) 1 battery case lid 5 BATT lead (white) –... -
Page 5: Section 3 Electrical Adjustments
SECTION 3 ELECTRICAL ADJUSTMENTS 0dB=1 µV FM FREQUENCY COVERAGE ADJUSTMENT Adjust for a reading on digital voltmeter. [FM/TV Section] 87.5 MHz (TV 2 ch) 2.3 ± 0.1 V (1.0 ± 0.1 V) Setting: Confirm 108.0 MHz 8.5 ± 0.5 V (12.5 ± 0.5 V) BAND switch: FM1 or TV Note: Not use the FM RF signal generator in this adjustment. - Page 6 Adjustment and Connection Location: [MAIN BOARD] (Component Side) AM IF FM antenna ground (JW17) TV IF (ICF-S79V only) FM FREQUENCY TV FREQUENCY COVERAGE COVERAGE (ICF-S79V only) TV TRACKING TRACKING (ICF-S79V only) FM/TV AM (MW) antenna input FREQUENCY (JW18) COVERAGE TV antenna ground (JW20) LW FREQUENCY...
- Page 7 ICF-S79/S79L/S79V SECTION 4 DIAGRAMS 4-1. PRINTED WIRING BOARDS Semiconductor Location Ref. No. Location Ref. No. Location HOW TO CHANGE THE CERAMIC FILTERS This model is used two ceramic filters of CF1, CF3. You must use same type of color marked ceramic filters in order to meet same specifications.
- Page 8 ICF-S79/S79L/S79V • See page 11 for Waveforms and IC Block Diagrams. 4-2. SCHEMATIC DIAGRAM (ICF-S79/S79L) Note on Schematic Diagram: • All capacitors are in µF unless otherwise noted. pF: µµF • Voltages are taken with a VOM (Input impedance 10 MΩ).
- Page 9 ICF-S79/S79L/S79V • See page 11 for Waveforms and IC Block Diagrams. 4-3. SCHEMATIC DIAGRAM (ICF-S79V) Note on Schematic Diagram: • All capacitors are in µF unless otherwise noted. pF: µµF 50 • Voltages are taken with a VOM (Input impedance 10 MΩ).
- Page 10 • IC Block Diagrams • Waveforms 1 IC6 @∞ (XIN) IC1 TA7358P (ICF-S79V only) REGULATOR BIAS 2 Vp-p 13.3 µ s 2 IC6 #¡ – #¢ (COM0 – COM3) 29 28 27 26 18 17 16 3 Vp-p AM IF DET AGC TUNING METER AF POWER AMP...
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Page 11: Ic Pin Function Description
Initialize signal input for the destination select Fixed at “L” Initialize signal input for the destination select ICF-S79/S79L: initialize mode at “H”, ICF-S79V: fixed at “L” Initialize signal input for the destination select ICF-S79L: initialize mode at “H”, ICF-S79/S79V: fixed at “L”... -
Page 12: Section 5 Exploded View
SECTION 5 EXPLODED VIEW NOTE: • -XX and -X mean standardized parts, so they • Items marked “*” are not stocked since they may have some difference from the original one. are seldom required for routine service. Some • Color Indication of Appearance Parts delay should be anticipated when ordering these Example: items. -
Page 13: Electrical Parts List
SECTION 6 MAIN ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in the • Items marked “*” are not stocked since they When indicating parts by reference parts list may be different from the parts speci- are seldom required for routine service. number, please include the board. - Page 14 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-164-232-11 CERAMIC CHIP 0.01uF 1-164-232-11 CERAMIC CHIP 0.01uF 1-163-131-00 CERAMIC CHIP 390PF (S79L/S79V) 1-163-229-11 CERAMIC CHIP 12PF 1-163-038-00 CERAMIC CHIP 0.1uF 1-163-128-00 CERAMIC CHIP 300PF 1-163-229-11 CERAMIC CHIP 12PF (S79L) (S79V)
- Page 15 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < CHIP CONDUCTOR > 8-729-402-19 TRANSISTOR XN6501 8-729-904-87 TRANSISTOR 2SB1197K-R 1-216-295-00 CONDUCTOR, CHIP (2012) (S79L/S79V) 8-729-027-60 TRANSISTOR DTC144TKA-T146 1-216-296-00 CONDUCTOR, CHIP (3216) 8-729-216-22 TRANSISTOR 2SA1162-G (S79V) 1-216-296-00 CONDUCTOR, CHIP (3216) 8-729-901-73 TRANSISTOR 2SC2412K (S79V) 1-216-295-00 CONDUCTOR, CHIP (2012) (S79V) 1-216-295-00 CONDUCTOR, CHIP (2012)
- Page 16 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-216-089-00 METAL CHIP 1/10W < VARIABLE RESISTOR > 1-216-105-00 METAL CHIP 220K 1/10W 1-216-049-11 METAL CHIP 1/10W 1-225-550-11 RES, VAR, CARBON 50K (VOL) 1-216-097-00 METAL CHIP 100K 1/10W 1-216-073-00 METAL CHIP 1/10W...